The trial version for PDF Merger Deluxe works exactly the same as the registered version excpet
the trial version will only create a file up to a total of 10 pages

Simple program to merge PDF files into one single multi-page pdf file. You have
several methods you can use to merge pdf files into one. You can use the command-line support, add a single file,
add a directory (including sub-folders), and even drag and drop pdf files to be merged. This is one of the easiest
and fastest programs available to combine pdf files.